HUMAN RADIATION EXPERIMENTS HISTORICAL BACKGROUND From 1946-1974, several agencies of the United States government conducted or sponsored experiments on human subjects involving radioactive materials. The agencies included the Atomic Energy Commission and several branches of the military services, among others. Many such experiments resulted in valuable medical advances like radiation treatments for cancer and the use of isotopes to accurately diagnose illnesses. However, the Clinton Administration has questions about whether subjects of some experiments were treated properly. There are indications that in some cases: (1) some subjects may not have been notified that they were participating in an experiment; (2) some subjects may not have given proper informed consent; (3) certain subjects gave consent, but may not have been fully informed of potential health consequences of the experiment; (4) experiments were conducted with disturbing frequency on subjects from vulnerable populations: poor people, elderly people, retarded persons, infants, prison inmates, and hospital patients suffering from terminal conditions; and (5) some experiments served no apparent therapeutic medical purpose. Information about these experiments has trickled out over the years, but the government has never made a true accounting to the American people about this period of the Cold War. President Clinton and his Administration are committed to making government open, honest, and responsive to the American people. The Clinton Administration has now launched a major effort to collect and make public all information available about radiation experiments conducted on human subjects by the government.